1101212020157 has 2 divisors, whose sum is σ = 1101212020158. Its totient is φ = 1101212020156.

The previous prime is 1101212020003. The next prime is 1101212020199. The reversal of 1101212020157 is 7510202121011.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 972312351481 + 128899668676 = 986059^2 + 359026^2 .

It is a cyclic number.

It is not a de Polignac number, because 1101212020157 - 2¹⁰ = 1101212019133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1101212026157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550606010078 + 550606010079.

It is an arithmetic number, because the mean of its divisors is an integer number (550606010079).

Almost surely, 2^{1101212020157} is an apocalyptic number.

It is an amenable number.

1101212020157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101212020157 is an equidigital number, since it uses as much as digits as its factorization.

1101212020157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 280, while the sum is 23.

Adding to 1101212020157 its reverse (7510202121011), we get a palindrome (8611414141168).

The spelling of 1101212020157 in words is "one trillion, one hundred one billion, two hundred twelve million, twenty thousand, one hundred fifty-seven".